AnsweredAssumed Answered

KL25z outputting 3.3v when connected through USB when configured for ADC

Question asked by owen lee on Mar 23, 2018
Latest reply on Mar 27, 2018 by Kerry Zhou

Hello. I am using the KL25z and I am running into an interesting problem. Some of the pins are outputting a constant 3.3v when connected through USB despite being configured differently. Specifically I am configuring PTE22 to be ADC input on channel 3 and when connected to the uVision debugger the values don't make any sense. When reading the voltage coming directly out of PTE22 I am seeing 3.3v. When I unplug the cable and power the device through the Vin I see 0v and I assume that means it is functioning as the ADC input. What could be causing this? The code configures everything correctly because I don’t see this problem on a different KL25z that is configured and wired the same way.  

Outcomes